Preparation of nitrogen-doped porous carbon anode and its application in microbial fuel cells
Microbial fuel cells(MFCs),as a bioelectrochemical system that can replace traditional energy sources,have attracted great interest of researchers,and the construction of anode materials is the current research focus.In order to improve the physical and chemical properties of the surface of the anode material,the nitrogen-doped three-dimensional carbon material was directly sintered by using toast as the porous carbon precursor and melamine as the nitrogen source,and compared with the anode material without adding nitrogen source and the unmodified commercial carbon cloth.The nitrogen-doped NB1000 anode has a large specific surface area(216.664 m2·g-1)and excellent conductivity.A mixed Geobacter and Shewanella colony was used to culture and evaluate the performance of MFCs,and the maximum areal power density and current density of the microbial fuel cell with NB1000 anode were 3049.714 mW·m-2 and 7.4464 A·m-2.It is 6.54 times and 1.54 times that of ordinary carbon cloth anode,respectively.The results showed that the high power density of MFCs from NB1000 anode was due to the introduction of nitrogen into the anode,which promoted the secretion of c-type cytochromes OmcA and MtrC in the outer membrane,which were required for the extracellular electron transport process of electrogenic microorganisms.
microbial fuel cellsvesicular structurenitrogen doped anodeextracellular electron transfer
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